Cooling device for xylene production

Abstract

The utility model provides a kind of cooling device for xylene preparation, it is related to cooling device technical field, including cooling cylinder, inner cylinder and cooling pipeline, the inner cylinder is located in the cooling cylinder, and first accommodating cavity is formed between the outer wall of the inner cylinder and the inner wall of the cooling cylinder;The cooling pipeline is arranged in the first accommodating cavity, the cooling pipeline is spiral, and is around the outer wall of the inner cylinder, the spiral center line of the cooling pipeline is along the height direction of the inner cylinder, and in the height direction of the inner cylinder, the adjacent portion of the cooling pipeline is spaced apart and arranged.Between the outer wall of the inner cylinder and the cooling liquid, xylene gas can be heat exchanged by setting cooling cylinder, inner cylinder and cooling pipeline, meanwhile, xylene gas can also be heat exchanged between the outer wall of cooling pipeline and the cooling liquid, so as to increase the heat exchange area between xylene gas and the cooling liquid, so as to improve the heat exchange efficiency of xylene gas, improve the preparation efficiency of xylene.

Description

Technical Field

[0001] The utility model relates to the field of cooling device technology, and in particular to a cooling device for xylene preparation. Background Technology

[0002] In the preparation of xylene, the cooling device plays a crucial role. It helps to lower the reaction temperature, control the reaction rate, and improve the purity and yield of the product, ensuring safe, efficient, and high-quality production. During the production process, xylene needs to be distilled to remove impurities, and the distilled xylene then needs to be cooled.

[0003] Currently, when cooling xylene gas, it is necessary to separate the xylene gas from the coolant to ensure the continuity and efficiency of xylene preparation. As a result, the heat exchange area between the xylene gas and the coolant is small, leading to low cooling efficiency of xylene gas in the cooling device. This problem seriously affects the preparation of xylene. Utility Model Content

[0004] The present invention provides a cooling device for xylene preparation, which solves the technical problem that the heat exchange area between xylene gas and coolant is small, resulting in low cooling efficiency of xylene gas in the cooling device.

[0005] The utility model provides a cooling device for xylene preparation, comprising: Cooling cylinder; An inner cylinder is located inside the cooling cylinder, and a first receiving cavity is formed between the outer wall of the inner cylinder and the inner wall of the cooling cylinder; A cooling pipe is disposed within the first receiving cavity. The cooling pipe is spiral-shaped and wound around the outer wall of the inner cylinder. The spiral centerline of the cooling pipe is arranged along the height direction of the inner cylinder, and adjacent portions of the cooling pipe are spaced apart along the height direction of the inner cylinder.

[0006] In one embodiment of the utility model, the cooling device for xylene preparation further includes an outer cylinder, the cooling cylinder being located inside the outer cylinder, and a second receiving cavity being formed between the outer wall of the cooling cylinder and the inner wall of the outer cylinder.

[0007] In one embodiment of the utility model, the second receiving cavity and the inner cavity of the inner cylinder are connected by a connecting pipe.

[0008] In one embodiment of the utility model, the cross-section of the cooling pipe is spindle-shaped, the spindle shape has a long axis direction, and the two ends of the spindle shape in the long axis direction are respectively connected to the inner wall of the cooling cylinder and the outer wall of the inner cylinder.

[0009] In one embodiment of the utility model, a stirring assembly is provided in the inner cavity of the inner cylinder, and the stirring assembly is used to stir the liquid in the inner cylinder.

[0010] In one embodiment of the utility model, the stirring assembly includes a main shaft and a plurality of stirring rods, wherein the plurality of stirring rods are arranged sequentially at intervals along the axial direction of the main shaft.

[0011] In one embodiment of the utility model, a spiral structure is provided inside the inner cavity of the inner cylinder, the spiral center line of the spiral structure is arranged along the height direction of the inner cylinder, and adjacent portions of the spiral structure are spaced apart in the height direction of the inner cylinder.

[0012] In one embodiment of the utility model, both ends of the outer cylinder are provided with a cover, and the inner side of the cover is provided with a sealing structure, which is used to seal the first receiving cavity, the second receiving cavity and the inner cavity of the inner cylinder.

[0013] In one embodiment of the utility model, the sealing structure includes a first annular groove, a second annular groove, and a third annular groove. The first annular groove corresponds to the end opening of the inner cylinder and accommodates the edge of the end of the inner cylinder. The second annular groove corresponds to the end opening of the cooling cylinder and accommodates the edge of the end of the cooling cylinder. The third annular groove corresponds to the end opening of the outer cylinder and accommodates the edge of the end of the outer cylinder. A sealing ring is provided in each of the first annular groove, the second annular groove, and the third annular groove.

[0014] In one embodiment of the utility model, a first observation window is provided on the cooling cylinder, and a second observation window is provided on the outer cylinder corresponding to the first observation window.

[0015] Beneficial effects of the utility model: The cooling device for xylene preparation proposed in this utility model, by setting up a cooling cylinder, an inner cylinder and cooling pipes, allows xylene gas to exchange heat between the outer wall of the inner cylinder and the coolant, and at the same time, xylene gas can also exchange heat between the outer wall of the cooling pipes and the coolant. This increases the heat exchange area between xylene gas and coolant, thereby improving the heat exchange efficiency of xylene gas and increasing the preparation efficiency of xylene, which has good economic value. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0017] In the attached diagram: Figure 1 A schematic diagram of the structure of a cooling device for xylene preparation provided in an embodiment of the utility model; Figure 2 A cross-sectional structural schematic diagram of a cooling device for xylene preparation provided in an embodiment of the utility model; Figure 3 A schematic diagram of the structure of the top cover provided in an embodiment of the utility model; Figure 4 This is a schematic diagram of the structure of the lower cover provided in an embodiment of the utility model.

[0018] The attached figures are labeled as follows: Outer cylinder 1, upper cover 2, first coolant inlet / outlet 201, second coolant inlet / outlet 202, main shaft through hole 203, xylene gas inlet 204, upper cover flange 205, first coolant inlet / outlet pipe 3, second coolant inlet / outlet pipe 4, xylene gas inlet pipe 5, connecting pipe 6, motor 7, xylene liquid outlet pipe 8, lower cover 9, first connecting opening 901, second connecting opening 902, main shaft mounting blind hole 903, xylene liquid outlet 904, lower cover flange 905, cooling cylinder 10, inner cavity 11, inner cylinder 12, stirring assembly 13, stirring rod 1301, main shaft 1302, cooling pipe 14, second receiving cavity 15, sealing structure 16, third annular groove 1601, second annular groove 1602, first annular groove 1603; support frame 17, support foot 1701, ring frame 1702, first receiving cavity 18. Detailed Implementation

[0019] The following specific examples illustrate the implementation of the utility model. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the utility model. The drawings only show the components related to the utility model and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the utility model. However, it will be apparent to those skilled in the art that embodiments of the utility model may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the utility model.

[0022] Please see Figure 1 and Figure 2 A cooling device for xylene preparation includes a cooling cylinder 10, an inner cylinder 12, and a cooling pipe 14. The inner cylinder 12 is located inside the cooling cylinder 10, and a first receiving cavity 18 is formed between the outer wall of the inner cylinder 12 and the inner wall of the cooling cylinder 10. The cooling pipe 14 is disposed within the first receiving cavity 18 and is spiral-shaped, winding around the outer wall of the inner cylinder 12. The spiral centerline of the cooling pipe 14 is arranged along the height direction of the inner cylinder 12, and adjacent portions of the cooling pipe 14 are spaced apart along the height direction of the inner cylinder 12. By configuring the cooling cylinder 10, the inner cylinder 12, and the cooling pipe 14, xylene gas can exchange heat with the coolant through the outer wall of the inner cylinder 12, and simultaneously, xylene gas can also exchange heat with the coolant through the outer wall of the cooling pipe 14. This increases the heat exchange area between the xylene gas and the coolant, thereby improving the heat exchange efficiency of the xylene gas and increasing the preparation efficiency of xylene, which has good economic value.

[0023] The cooling device for xylene preparation also includes an outer cylinder 1, with a cooling cylinder 10 located inside the outer cylinder 1. A second receiving cavity 15 is formed between the outer wall of the cooling cylinder 10 and the inner wall of the outer cylinder 1. By setting the outer cylinder 1, xylene gas can exchange heat with the coolant in the second receiving cavity 15 through the cylinder wall of the cooling cylinder 10, further increasing the heat exchange area between the xylene gas and the cooling device and improving the efficiency of xylene cooling.

[0024] The outer cylinder 1, cooling cylinder 10, and inner cylinder 12 are all cylindrical, with openings at both ends. Both ends of the outer cylinder 1 are fitted with covers, and a sealing structure 16 is installed inside each cover. The sealing structure 16 seals the first receiving cavity 18, the second receiving cavity 15, and the inner cavity 11 of the inner cylinder 12. This structure facilitates the disassembly and assembly of the cooling device. When maintenance is required, only some components can be replaced, saving on repair costs. The cover closer to the ground is the lower cover 9, and the cover further from the ground is the upper cover 2. The upper cover 2 and the lower cover 9 are threadedly connected to the outer cylinder 1 with screws.

[0025] like Figure 3 and Figure 4As shown, in this embodiment, the sealing structure 16 includes a first annular groove, a second annular groove 1602, and a third annular groove 1601. The first annular groove corresponds to the end opening of the inner cylinder 12 and accommodates the edge of the end opening of the inner cylinder 12. The second annular groove 1602 corresponds to the end opening of the cooling cylinder 10 and accommodates the edge of the end opening of the cooling cylinder 10. The third annular groove 1601 corresponds to the end opening of the outer cylinder 1 and accommodates the edge of the end opening of the outer cylinder 1. Sealing rings are provided in the first annular groove, the second annular groove 1602, and the third annular groove 1601, thus ensuring the sealing performance of the cooling device while guaranteeing convenient disassembly and maintenance. The outer cylinder 1 has a thicker wall, and threaded holes are provided on the edge of the outer cylinder 1 facing the cover. The upper cover 2 and the lower cover 9 are both provided with through holes corresponding to the edge of the outer cylinder 1.

[0026] In this embodiment, the two covers are respectively provided with a xylene gas inlet 204 and a xylene liquid outlet 904 corresponding to the first receiving cavity 18. Since xylene gas will turn into xylene liquid after cooling, the lower cover 9 of the cooling device is provided with a xylene liquid outlet 904, and the upper cover 2 is provided with a xylene gas inlet 204. The upper cover 2 is provided with a first coolant inlet / outlet 201 and a second coolant inlet / outlet 202. The first coolant inlet / outlet 201 is provided corresponding to the second receiving cavity 15, and the second coolant inlet / outlet 202 is provided corresponding to the inner cavity 11 of the inner cylinder 12. The lower cover 9 is provided with a connecting pipe 6 that communicates with the inner cavity 11 of the inner cylinder 12 in the part corresponding to the second receiving cavity 15. The connecting pipe 6 can make full use of the cold energy carried in the coolant and save energy consumption. The lower cover 9 has a first connecting opening 901 and a second connecting opening 902. The first connecting opening 901 corresponds to the second receiving cavity 15, and the second connecting opening 902 corresponds to the inner cavity 11 of the inner cylinder 12. The connecting pipe 6 is connected to the first connecting opening 901 and the second connecting opening 902 respectively. The upper cover 2 is provided with a first coolant inlet / outlet pipe 3, a second coolant inlet / outlet pipe 4, and a xylene gas inlet pipe 5. The first coolant inlet / outlet pipe 3 is connected to the first coolant inlet / outlet 201, the second coolant inlet / outlet pipe 4 is connected to the second coolant inlet / outlet 202, and the xylene gas inlet pipe 5 is connected to the xylene gas inlet 204. The lower cover 9 is also provided with a xylene liquid outlet 904 and a xylene liquid outflow pipe 8, which is connected to the xylene liquid outlet 904. The upper cover 2 is also provided with an upper cover flange 205 in the circumferential direction. The upper cover flange 205 is used to wrap the edge of the upper opening of part of the outer cylinder 1. The lower cover 9 is also provided with a lower cover flange 905 in the circumferential direction. The lower cover flange 905 is used to wrap the edge of the lower opening of part of the outer cylinder 1 to improve the sealing of the cover to the outer cylinder 1 and facilitate the positioning of the cover and the outer cylinder 1 during loading and unloading.

[0027] In some embodiments, the second coolant inlet and the second coolant outlet of the second receiving cavity 15 are respectively disposed on two covers, and the third coolant inlet and the third coolant outlet of the inner cavity 11 of the inner cylinder 12 are respectively disposed on two covers.

[0028] In this embodiment, the cooling pipe has a spindle-shaped cross-section with a long axis. The two ends of the spindle along its long axis are connected to the inner wall of the cooling cylinder 10 and the outer wall of the inner cylinder 12, respectively. This avoids the cooling pipe occupying excessive space within the cooling cylinder 10 while ensuring sufficient contact area with the xylene gas. In some embodiments, the cooling pipe may have a rectangular or circular cross-section, and the cross-sectional shape can be adjusted according to actual usage requirements.

[0029] The inner cavity 11 of the inner cylinder 12 is equipped with a stirring assembly 13, which is used to agitate the liquid inside the inner cylinder 12. By setting the stirring assembly 13, the coolant inside the inner cylinder 12 can be agitated, so that the temperature of the coolant inside the inner cylinder 12 is more uniform, avoiding a large temperature difference between the coolant temperature near the inner wall of the inner cylinder 12 and the coolant temperature far from the inner wall of the inner cylinder 12, thereby improving the utilization rate of the coolant.

[0030] In this embodiment, the stirring assembly 13 includes a main shaft 1302 and multiple stirring rods 1301, which are sequentially spaced along the axial direction of the main shaft 1302. The arrangement of the stirring rods 1301 on the main shaft 1302 can be adjusted according to actual needs. When the stirring rods 1301 stir in the inner cylinder, they generate stratified circulation, increasing the uniformity of heat exchange between xylene and the coolant in the inner cylinder. The lower cover 9 is provided with a blind hole 903 for inserting the end of the main shaft 1302 and limiting the main shaft 1302. The upper cover 2 is provided with a main shaft through hole 203 for the main shaft 1302 to pass through outside the inner cylinder 12. After the main shaft 1302 passes through the inner cylinder 12, it is connected to the output shaft of the motor 7. The output shaft is coaxial with the main shaft 1302. The motor 7 is used to drive the main shaft 1302 to rotate, so that the stirring rods 1301 stir the coolant in the inner cylinder 12.

[0031] In some embodiments, a spiral structure is provided in the inner cavity 11 of the inner cylinder 12. The spiral center line of the spiral structure is arranged along the height direction of the inner cylinder 12. Adjacent portions of the spiral structure are spaced apart in the height direction of the inner cylinder 12. Because a spiral structure is provided in the inner cavity 11, when the coolant enters the inner cavity 11 of the inner cylinder 12, the coolant presents a spiral flow trajectory under the guidance of the spiral structure, thereby agitating the coolant and improving the utilization rate of the coolant.

[0032] In this embodiment, a first observation window is provided on the cooling cylinder 10, and a second observation window is provided on the outer cylinder 1 corresponding to the first observation window. By providing the first and second observation windows, the operator can observe the state of xylene gas being cooled into xylene liquid in real time. If the height of the xylene liquid exceeds the warning value, the amount of xylene gas entering can be reduced or the amount of xylene liquid discharged can be increased, thus increasing the flexibility of the cooling device during use.

[0033] In some embodiments, a first level gauge and a second level gauge are provided in the first cooling chamber of the cooling cylinder 10. The first level gauge is used to detect a first liquid level, and the second level gauge is used to detect a second liquid level. When the xylene liquid reaches the first liquid level, the first level gauge sends a first signal to trigger an alarm device; when the xylene liquid reaches the second liquid level, the second level gauge sends a second signal to trigger an alarm device. This allows for real-time monitoring of the xylene liquid level in the first chamber and timely notification to the operator.

[0034] In this embodiment, a support frame for supporting the outer cylinder 1 is provided on the outer wall of the outer cylinder 1. The support frame includes support feet 1701 and a ring frame 1702. The ring frame 1702 surrounds the outer wall of the outer cylinder 1. The support feet 1701 are spaced apart circumferentially along the ring frame 1702. One end of the support foot 1701 is connected to the ring frame 1702, and the other end is used to contact the ground.

[0035] In summary, by setting up the cooling cylinder 10, the inner cylinder 12, and the cooling pipe 14, xylene gas can exchange heat with the coolant through the outer wall of the inner cylinder 12, and simultaneously, xylene gas can also exchange heat with the coolant through the outer wall of the cooling pipe 14. This increases the heat exchange area between xylene gas and the coolant, thereby improving the heat exchange efficiency of xylene gas and increasing the preparation efficiency of xylene, which has good economic value.

[0036] The above embodiments are merely illustrative of the principles and effects of the utility model and are not intended to limit the utility model. Anyone skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the utility model should still be covered by the claims of the utility model.

Claims

1. A cooling apparatus for xylene preparation, characterized in that, include: Cooling cylinder; An inner cylinder is located inside the cooling cylinder, and a first receiving cavity is formed between the outer wall of the inner cylinder and the inner wall of the cooling cylinder; A cooling pipe is disposed in the first receiving cavity. The cooling pipe is spiral and is wound around the outer wall of the inner cylinder. The spiral center line of the cooling pipe is arranged along the height direction of the inner cylinder. Adjacent portions of the cooling pipe are spaced apart along the height direction of the inner cylinder. The cooling pipe has a spindle-shaped cross-section with a long axis. The two ends of the spindle in the long axis direction are connected to the inner wall of the cooling cylinder and the outer wall of the inner cylinder, respectively.

2. The cooling apparatus for xylene preparation according to claim 1, characterized in that: The cooling device for xylene preparation further includes an outer cylinder, the cooling cylinder being located inside the outer cylinder, and a second receiving cavity being formed between the outer wall of the cooling cylinder and the inner wall of the outer cylinder.

3. The cooling apparatus for xylene preparation according to claim 2, characterized in that: The second receiving cavity and the inner cavity of the inner cylinder are connected by a connecting pipe.

4. The cooling apparatus for xylene preparation according to claim 1, characterized in that: A stirring assembly is provided in the inner cavity of the inner cylinder, which is used to agitate the liquid inside the inner cylinder.

5. The cooling apparatus for xylene preparation according to claim 4, characterized in that: The stirring assembly includes a main shaft and multiple stirring rods, with the multiple stirring rods arranged sequentially and at intervals along the axial direction of the main shaft.

6. The cooling apparatus for xylene preparation according to claim 1, characterized in that: The inner cavity of the inner cylinder is provided with a spiral structure, the spiral center line of which is arranged along the height direction of the inner cylinder, and adjacent portions of the spiral structure are spaced apart along the height direction of the inner cylinder.

7. The cooling apparatus for xylene preparation according to claim 2, characterized in that: Both ends of the outer cylinder are provided with a cover, and the inner side of the cover is provided with a sealing structure. The sealing structure is used to seal the first receiving cavity, the second receiving cavity and the inner cavity of the inner cylinder.

8. The cooling apparatus for xylene preparation according to claim 7, characterized in that: The sealing structure includes a first annular groove, a second annular groove, and a third annular groove. The first annular groove corresponds to the end opening of the inner cylinder and accommodates the edge of the end opening of the inner cylinder. The second annular groove corresponds to the end opening of the cooling cylinder and accommodates the edge of the end opening of the cooling cylinder. The third annular groove corresponds to the end opening of the outer cylinder and accommodates the edge of the end opening of the outer cylinder. A sealing ring is provided in each of the first annular groove, the second annular groove, and the third annular groove.

9. The cooling apparatus for xylene preparation according to claim 2, characterized in that: The cooling cylinder is provided with a first observation window, and the outer cylinder is provided with a second observation window corresponding to the first observation window.

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